JP2005191651A - Cellular phone system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable a user to listen to music through a speaker for music installed on a desktop holder on which a cellular phone main body is mounted, and enable simplifying the structure of the desktop holder. <P>SOLUTION: A cellular phone system comprises the cellular phone main body 100 and the desktop holder 200 having terminals 202a-202f each to be connected with the cellular phone main body when the cellular phone main body is mounted on the holder. The cellular phone main body is provided with a recording medium 112 storing music data in addition to a communication function, a reproducing means 113 and amplifier means 114, 115 for reproducing and amplifying the music data, and a charging means 109 for charging a battery for driving the cellular phone main body. On the other hand, the desktop holder 200 is provided with speakers 201a, 201b for music driven by the amplifier means 115, and terminals 202e, 202f for connecting an AC adaptor 300 to the charging means. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention can enjoy stereo music for a long time by using a speaker mounted on a desktop holder for a mobile phone when playing back music data stored in a recording medium of a mobile phone and outputting sound. The present invention relates to a mobile phone system.

  2. Description of the Related Art In recent years, mobile phones having a function of recording music data such as music CDs distributed by mobile phone carriers and music data such as music CDs in a built-in or external recording medium and reproducing sound from the recording medium. Is provided. When playing back music data recorded on a recording medium, such a mobile phone has a built-in speaker in the mobile phone body, stereo headphones connected to the headphone jack of the mobile phone, or a speaker built in the desktop holder of the mobile phone. Use to enjoy music. A conventional mobile phone desktop holder is composed of a circuit component that charges a secondary battery of a mobile phone, an amplifier that amplifies an audio signal received from the mobile phone, and a speaker that outputs the amplified audio signal. Such a prior art is disclosed in Patent Document 1.

JP 2002-101177 A (page 1-2 and FIG. 5)

  The conventional mobile phone desktop holder is configured as described above, so you can connect stereo headphones to the mobile phone to enjoy music, or use the built-in speaker in the mobile phone to enjoy music. Both the amplifier built in the mobile phone to be used and the amplifier built in the desktop holder used when listening to music with the mobile phone mounted on the desktop holder are required, so the cost of the desktop holder increases due to an increase in circuit parts . In addition, since a circuit for charging the secondary battery of the mobile phone was mounted on the desktop holder, the desktop holder is always required when charging the secondary battery of the mobile phone on the go. There was a hassle of having to take a desktop holder with a large form to the outside.

  The present invention has been made to solve the above-described problems. The amplifier and the charging circuit mounted on the desktop holder are omitted to reduce the cost, and the mobile phone is mounted on the desktop holder. An object is to provide a mobile phone system that can recognize and enjoy, for example, stereo music for a long time from a speaker of a desktop holder.

  The mobile phone system according to the present invention is a mobile phone system comprising a mobile phone body and a desktop holder having a terminal electrically connected to the mobile phone body when the mobile phone body is mounted. In addition to the calling function, the table holder includes a reproducing means and an amplifying means for reproducing and amplifying music data stored in a recording medium in the mobile phone body, and a battery charging means for driving the mobile phone body. Is provided with a music speaker driven by the amplifying means and a terminal for connecting an AC adapter to the charging means.

  According to the present invention, it is possible to recognize that the mobile phone is attached to the desktop holder and to enjoy music from the speaker built in the desktop holder and to enjoy music with the mobile phone body alone. In addition, since the amplifier that amplifies the music signal uses the one built in the mobile phone, the circuit components in the desktop holder can be reduced and the cost can be reduced. In addition, since the circuit for charging the secondary battery of the mobile phone is not mounted on the desktop holder, the desktop holder can be configured to be lightweight and inexpensive, and the desktop holder can be easily carried.

Embodiment 1 FIG.
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of a mobile phone body 100, a desktop holder 200, and an AC adapter 300 according to Embodiment 1 of the present invention. First, the mobile phone body 100 will be described. The mobile phone main body 100 includes a display unit 101, an operation unit 102, a main control unit 103, a telephone unit 104, a wireless unit 105, an antenna 106, a call microphone 107, and a call speaker 108, as well as elements that control a call function. Unit 109, secondary battery 110, power supply unit 111, recording medium 112, recording / playback unit 113, speaker / headphone switching amplifier 114, stereo amplifier 115, earphone jack 116, music speaker 117, wearing detection unit 118, inverter 119 , Terminals 120a to 120f and a connector 121 are provided.

  The operation unit 102 allows the user to input various commands to the mobile phone body. The display unit 101 displays various information. The main control unit 103 controls the operation of each unit of the mobile phone body 100 according to the input signal received from the operation unit 102. The call microphone 107 converts an externally input voice into an electrical signal. The telephone unit 104 encodes the audio signal obtained by the call microphone 107 by a predetermined method. Radio section 105 modulates the voice signal encoded by telephone section 104 and transmits it from antenna 106, and demodulates the signal received by antenna 106. The speaker for call 108 converts the audio signal demodulated by the telephone unit 104 via the wireless unit 105 into audio and outputs it to the outside.

  The charging unit 109 includes a charging control unit 109a and a charging detection unit 109b. The charging control unit 109 a charges the secondary battery 110 using power supplied from the AC adapter 300 via the terminal units 120 e and 120 f of the mobile phone body 100 or the connector 121. The charge detection unit 109 b detects the charge voltage to the secondary battery 110 and gives the information to the main control unit 103. The main control unit 103 controls whether or not the secondary battery 110 needs to be charged by controlling the charge control unit 109a based on information from the charge detection unit 109b. The power supply unit 111 supplies appropriate power to each unit in the mobile phone body 100.

  The recording medium 112 is built in or externally attached to the mobile phone main body 100 and stores audio data. The recording / playback unit 113 reads the audio data stored in the recording medium 112 and generates a decoded audio signal R and audio signal L, and the audio data is stored in the recording medium 112 according to a command from the main control unit 103. Has the function of storing. The speaker / headphone switching amplifier 114 amplifies the audio signal that is read and decoded by the recording / playback unit 113. The speaker / headphone switching amplifier 114 is provided with a circuit for recognizing whether or not stereo headphones are connected to the earphone jack 116, and outputs to the music speaker 117 built in the mobile phone body 100. Or switch the output to stereo headphones. Furthermore, it has a function to turn on / off the amplifier operation.

  The stereo amplifier 115 amplifies the audio signal that has been read and decoded by the recording / playback unit 113 and outputs the amplified audio signal to the music speakers 201 a and 201 b built in the desktop holder 200. Further, the stereo amplifier 115 has a function of turning on / off the amplifier operation. The earphone jack 116 is a part that delivers the amplified audio signal R and audio signal L to the connected stereo headphones. The attachment detection unit 118 detects whether or not the mobile phone body 100 is attached to the desktop holder 200. The music speaker 117 converts the amplified audio signal into audio and outputs it to the outside. The inverter 119 inverts the input signal level.

  Terminal portions 120 a to 120 f are terminals for electrically connecting the mobile phone body 100 to the desktop holder 200. These are terminals 120 a and 120 b that connect the audio signal L and the audio signal R from the stereo amplifier 115 to the music speaker 201 built in the desktop holder 200 when the cellular phone body 100 is mounted on the desktop holder 200. , 120c, a terminal 120d for recognizing that the mobile phone body 100 is mounted on the desktop holder 200, and a terminal 120e for charging the secondary battery 110 of the mobile phone body 100 with power supplied from the AC adapter 300, 120f. The connector 121 can directly connect the AC adapter 300 to the mobile phone body 100, and inputs power necessary for charging the secondary battery 110 from the AC adapter 300.

  Next, the desktop holder 200 will be described. The desktop holder 200 includes a music speaker L201a, a music speaker R201b, terminal portions 202a to 202f, and a connector 203. The music speaker L201a and the music speaker R201b input the audio signal L and the audio signal R amplified by the stereo amplifier 115 of the mobile phone body 100 and output the audio to the outside. The terminals 202 a to 202 f are connected to the music speakers 201 a and 201 b built in the desktop holder 200 with the audio signal L and the audio signal R amplified by the mobile phone body 100, and the desktop holder 200. Terminal 202d for recognizing that the mobile phone body 100 is attached to the mobile phone 100, and terminals 202e and 202f for charging the secondary battery 110 of the mobile phone body 100 with power supplied from the AC adapter 300. The connector 203 is a part for connecting the AC adapter 300, and is a connector for charging the secondary battery 110 of the mobile phone body 100 via the desktop holder 200.

  The AC adapter 300 converts commercial power into a DC power supply voltage suitable for the mobile phone body 100 and supplies the mobile phone body 100 with power. The connector 301 connected to the AC adapter 300 is connected to the connector 203 mounted on the desktop holder 200 or the connector 121 mounted on the mobile phone body 100.

  As shown in FIG. 2, the attachment detection unit 118 includes a resistor 122 and a resistor 123 connected in series between the power supply VCC and GND. A connection point 124 between the resistor 122 and the resistor 123 is connected to an input terminal of the speaker / headphone switching amplifier 14 and the inverter 119. The output terminal of the inverter 119 is connected to the stereo amplifier 115. A voltage determined by a voltage division ratio between the resistor 122 and the resistor 123 is applied to a connection point 124 between the resistor 122 and the resistor 123. For convenience of explanation, if the power supply VCC is 5 V, the resistor 122 is 20 KΩ, and the resistor 123 is 30 KΩ, a voltage of 3 V is applied to the connection point 124 between the resistor 122 and the resistor 123.

  When the cellular phone main body 100 is not attached to the desktop holder 200, the terminal 120d is open, so that a voltage of 3V is applied to the connection point 124 between the resistor 122 and the resistor 123, and the speaker / headphone switching amplifier 114 has " The “H” level is input, and the operation is turned on. Since the stereo amplifier 115 is connected via the inverter 119, the logic value is inverted and the "L" level is input, and the operation is turned off. Accordingly, at this time, only the speaker / headphone switching amplifier 114 operates. Since the speaker / headphone switching amplifier 114 has a circuit for recognizing whether or not the stereo headphones are connected to the earphone jack 116, the sound is output from the built-in music speaker 117 depending on whether or not the stereo headphones are connected. Or output to stereo headphones and output sound.

  When the mobile phone body 100 is mounted on the desktop holder 200, the terminal 120d contacts the terminal 202d and is connected to the negative terminal (GND) of the AC adapter 300, so that the connection point 124 between the resistor 122 and the resistor 123 is 0V. The speaker / headphone switching amplifier 114 receives the “L” level and is turned off, and the stereo amplifier 115 is connected to the inverter 119, so that the “H” level is inputted and the operation is turned on. Put it in a state. Accordingly, only the stereo amplifier 115 operates, and the amplified audio signal L, audio signal R, and common signal COM are connected to the desktop via the terminals 202a, 202b, and 202c of the desktop holder 200 via the terminals 120a, 120b, and 120c. It is connected to the music speakers 201a and 201b built in the holder 200 and outputs sound.

  Further, when the mobile phone body 100 is mounted on the desktop holder 200 and the connector 301 of the AC adapter 300 is connected to the connector 203 mounted on the desktop holder 200, the mobile phone body 100 is connected to the AC adapter. Because power is always supplied from 300, you can enjoy stereo music for a long time.

  When the mobile phone body 100 is mounted on the desktop holder 200 and the connector 301 of the AC adapter 300 is not connected to the connector 203 mounted on the desktop holder 200, the terminal 120d of the mobile phone body 100 is connected to the desktop. It is again connected to the terminal 120e of the mobile phone body 100 via the terminals 202d and 202e of the holder 200. Since the terminal 120e is at the same potential as the internal GND of the mobile phone body 100, the connection point 124 becomes a voltage of 0V, only the stereo amplifier 115 operates, and the audio is output from the music speaker 201 built in the desktop holder 200. Is done. At this time, sound is output using the power of the secondary battery 110 mounted on the mobile phone body 100.

  Note that charging the secondary battery 110 by directly connecting the AC adapter 300 to the mobile phone main body 100 is already well known, and a constant current circuit and a constant voltage necessary for charging the secondary battery 110 are currently known. The circuit is divided and mounted on the AC adapter 300, the mobile phone main body 100, or the AC adapter 300 and the mobile phone main body 100, and the charging circuit is generally not mounted on the desktop holder 200. . Therefore, the connector 301 of the AC adapter 300 can be directly connected to the connector 121 of the mobile phone body 100, and the secondary battery 110 can be charged. At this time, since the terminal 120e is opened, the operation is the same as when the mobile phone body 100 is not attached to the desktop holder 200.

Embodiment 2. FIG.
In the first embodiment of the present invention, the power supply VCC and GND and the resistor 122 and the resistor 123 are connected in series to the mounting detection unit 118, and the connection point 124 is a voltage dividing ratio of the resistor 122 and the resistor 123. It is shown that an electrical mounting detection unit is provided that is determined by the “H” level of the determined voltage or the “L” level at which the connection point 124 becomes GND when the mobile phone body 100 is mounted on the desktop holder 200. However, as shown in FIG. 3, a mechanical attachment detection may be performed by providing the attachment detection unit 118 with a switch 125 that opens and closes upon attachment.

  In FIG. 3, the connection point 124 is pulled up to the power supply VCC via the resistor 122. When the cellular phone main body 100 is not attached to the desktop holder 200, the switch 125 is “open”, and the connection point 124 is pulled up to the power supply VCC via the resistor 122, so that it becomes “H” level. When the mobile phone body 100 is attached to the desktop holder 200, the switch 125 is “closed” and the connection point 124 is connected to the GND and becomes the “L” level. In this way, by switching “H” / “L” of the connection point 124 using the switch 125, either the speaker / headphone switching amplifier 114 or the stereo amplifier 115 is turned on. In order to prevent chattering of the switch 125, a passive element such as an active element mounted with a Schmitt circuit or a capacitor may be added to the mounting detection unit 118. In addition, it is necessary to devise for pressing the switch 125, for example, to provide a projection or the like on the desktop holder 200.

  The present invention can be used for terminal devices such as mobile phones and portable information terminals.

It is a block diagram which shows the mobile telephone of the mobile telephone system which concerns on Embodiment 1 of this invention, a desktop holder, and an AC adapter. It is a circuit diagram of the mounting | wearing detection part mounted in the mobile telephone system of Embodiment 1 of this invention. It is a circuit diagram of the mounting | wearing detection part mounted in the mobile telephone system which concerns on Embodiment 2 of this invention.

Explanation of symbols

100 mobile phone body, 101 display unit,
102 operation unit, 103 main control unit,
104 telephone department, 105 radio department,
106 antenna, 107 call microphone,
108 speaker for call, 109 charging unit,
109a charge control unit, 109b charge detection unit,
110 secondary battery, 111 power supply unit,
112 recording medium, 113 recording / playback unit,
114 Speaker / stereo headphone switching amplifier,
115 stereo amplifier, 116 earphone jack,
117 music speaker, 118 wearing detection unit,
119 inverter,
120a-120f terminals,
121 connector,
122 resistance, 123 resistance,
124 connection points, 125 switches,
200 desktop holder, 201a speaker L for music,
201b Music speaker R,
202a to 202f terminals,
203 connector, 300 AC adapter,
301 connector.

Claims (6)

  In a mobile phone system comprising a mobile phone main body and a desktop holder having a terminal electrically connected to the mobile phone main body when the mobile phone main body is mounted, the mobile phone main body stores music data in addition to a call function. A stored recording medium; a reproducing means for amplifying and amplifying the music data; and an amplifying means; and a battery charging means for driving the mobile phone main body, while the desktop holder is a music driven by the amplifying means. A mobile phone system comprising a speaker for use and a terminal for connecting an AC adapter to the charging means.   2. The mobile phone system according to claim 1, wherein the mobile phone body includes attachment detection means for detecting whether or not the mobile phone body is attached to a desktop holder.   The mobile phone system according to claim 1 or 2, wherein the mobile phone body includes an earphone jack driven by the amplifying means.   The mobile phone system according to any one of claims 1 to 3, wherein the mobile phone main body includes a music speaker driven by the amplification means.   The amplification means is divided into a music speaker built in the mobile phone body or an amplifier connected to an earphone jack and an amplifier connected to a music speaker built in a desktop holder. The mobile phone system according to any one of claims 1 to 4.   The mobile phone body according to any one of claims 1 to 5, wherein the mobile phone body includes a connector for connecting an AC adapter to the charging means without using the desktop holder. Phone system.

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